:root {
    --sk-size: var(--b-spinkit-size, 40px);
    --sk-color: var(--b-spinkit-color, #333);
}


/* Utility class for centering */
.sk-center {
    margin: auto;
}


/*  Plane */
.sk-plane {
    width: var(--sk-size);
    height: var(--sk-size);
    background-color: var(--sk-color);
    animation: sk-plane 1.2s infinite ease-in-out;
}

@keyframes sk-plane {
    0% {
        transform: perspective(120px) rotateX(0deg) rotateY(0deg);
    }

    50% {
        transform: perspective(120px) rotateX(-180.1deg) rotateY(0deg);
    }

    100% {
        transform: perspective(120px) rotateX(-180deg) rotateY(-179.9deg);
    }
}


/*  Chase */
.sk-chase {
    width: var(--sk-size);
    height: var(--sk-size);
    position: relative;
    animation: sk-chase 2.5s infinite linear both;
}

.sk-chase-dot {
    width: 100%;
    height: 100%;
    position: absolute;
    left: 0;
    top: 0;
    animation: sk-chase-dot 2.0s infinite ease-in-out both;
}

    .sk-chase-dot:before {
        content: '';
        display: block;
        width: 25%;
        height: 25%;
        background-color: var(--sk-color);
        border-radius: 100%;
        animation: sk-chase-dot-before 2.0s infinite ease-in-out both;
    }

    .sk-chase-dot:nth-child(1) {
        animation-delay: -1.1s;
    }

    .sk-chase-dot:nth-child(2) {
        animation-delay: -1.0s;
    }

    .sk-chase-dot:nth-child(3) {
        animation-delay: -0.9s;
    }

    .sk-chase-dot:nth-child(4) {
        animation-delay: -0.8s;
    }

    .sk-chase-dot:nth-child(5) {
        animation-delay: -0.7s;
    }

    .sk-chase-dot:nth-child(6) {
        animation-delay: -0.6s;
    }

    .sk-chase-dot:nth-child(1):before {
        animation-delay: -1.1s;
    }

    .sk-chase-dot:nth-child(2):before {
        animation-delay: -1.0s;
    }

    .sk-chase-dot:nth-child(3):before {
        animation-delay: -0.9s;
    }

    .sk-chase-dot:nth-child(4):before {
        animation-delay: -0.8s;
    }

    .sk-chase-dot:nth-child(5):before {
        animation-delay: -0.7s;
    }

    .sk-chase-dot:nth-child(6):before {
        animation-delay: -0.6s;
    }

@keyframes sk-chase {
    100% {
        transform: rotate(360deg);
    }
}

@keyframes sk-chase-dot {
    80%, 100% {
        transform: rotate(360deg);
    }
}

@keyframes sk-chase-dot-before {
    50% {
        transform: scale(0.4);
    }

    100%, 0% {
        transform: scale(1.0);
    }
}


/*  Bounce */
.sk-bounce {
    width: var(--sk-size);
    height: var(--sk-size);
    position: relative;
}

.sk-bounce-dot {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background-color: var(--sk-color);
    opacity: 0.6;
    position: absolute;
    top: 0;
    left: 0;
    animation: sk-bounce 2s infinite cubic-bezier(0.455, 0.03, 0.515, 0.955);
}

    .sk-bounce-dot:nth-child(2) {
        animation-delay: -1.0s;
    }

@keyframes sk-bounce {
    0%, 100% {
        transform: scale(0);
    }

    45%, 55% {
        transform: scale(1);
    }
}


/*  Wave */
.sk-wave {
    width: var(--sk-size);
    height: var(--sk-size);
    display: flex;
    justify-content: space-between;
}

.sk-wave-rect {
    background-color: var(--sk-color);
    height: 100%;
    width: 15%;
    animation: sk-wave 1.2s infinite ease-in-out;
}

    .sk-wave-rect:nth-child(1) {
        animation-delay: -1.2s;
    }

    .sk-wave-rect:nth-child(2) {
        animation-delay: -1.1s;
    }

    .sk-wave-rect:nth-child(3) {
        animation-delay: -1.0s;
    }

    .sk-wave-rect:nth-child(4) {
        animation-delay: -0.9s;
    }

    .sk-wave-rect:nth-child(5) {
        animation-delay: -0.8s;
    }

@keyframes sk-wave {
    0%, 40%, 100% {
        transform: scaleY(0.4);
    }

    20% {
        transform: scaleY(1);
    }
}


/*  Pulse */
.sk-pulse {
    width: var(--sk-size);
    height: var(--sk-size);
    background-color: var(--sk-color);
    border-radius: 100%;
    animation: sk-pulse 1.2s infinite cubic-bezier(0.455, 0.03, 0.515, 0.955);
}

@keyframes sk-pulse {
    0% {
        transform: scale(0);
    }

    100% {
        transform: scale(1);
        opacity: 0;
    }
}


/*  Flow */
.sk-flow {
    width: calc(var(--sk-size) * 1.3);
    height: calc(var(--sk-size) * 1.3);
    display: flex;
    justify-content: space-between;
}

.sk-flow-dot {
    width: 25%;
    height: 25%;
    background-color: var(--sk-color);
    border-radius: 50%;
    animation: sk-flow 1.4s cubic-bezier(0.455, 0.03, 0.515, 0.955) 0s infinite both;
}

    .sk-flow-dot:nth-child(1) {
        animation-delay: -0.30s;
    }

    .sk-flow-dot:nth-child(2) {
        animation-delay: -0.15s;
    }

@keyframes sk-flow {
    0%, 80%, 100% {
        transform: scale(0.3);
    }

    40% {
        transform: scale(1);
    }
}


/*  Swing */
.sk-swing {
    width: var(--sk-size);
    height: var(--sk-size);
    position: relative;
    animation: sk-swing 1.8s infinite linear;
}

.sk-swing-dot {
    width: 45%;
    height: 45%;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    margin: auto;
    background-color: var(--sk-color);
    border-radius: 100%;
    animation: sk-swing-dot 2s infinite ease-in-out;
}

    .sk-swing-dot:nth-child(2) {
        top: auto;
        bottom: 0;
        animation-delay: -1s;
    }

@keyframes sk-swing {
    100% {
        transform: rotate(360deg);
    }
}

@keyframes sk-swing-dot {
    0%, 100% {
        transform: scale(0.2);
    }

    50% {
        transform: scale(1);
    }
}


/*  Circle */
.sk-circle {
    width: var(--sk-size);
    height: var(--sk-size);
    position: relative;
}

.sk-circle-dot {
    width: 100%;
    height: 100%;
    position: absolute;
    left: 0;
    top: 0;
}

    .sk-circle-dot:before {
        content: '';
        display: block;
        width: 15%;
        height: 15%;
        background-color: var(--sk-color);
        border-radius: 100%;
        animation: sk-circle 1.2s infinite ease-in-out both;
    }

    .sk-circle-dot:nth-child(1) {
        transform: rotate(30deg);
    }

    .sk-circle-dot:nth-child(2) {
        transform: rotate(60deg);
    }

    .sk-circle-dot:nth-child(3) {
        transform: rotate(90deg);
    }

    .sk-circle-dot:nth-child(4) {
        transform: rotate(120deg);
    }

    .sk-circle-dot:nth-child(5) {
        transform: rotate(150deg);
    }

    .sk-circle-dot:nth-child(6) {
        transform: rotate(180deg);
    }

    .sk-circle-dot:nth-child(7) {
        transform: rotate(210deg);
    }

    .sk-circle-dot:nth-child(8) {
        transform: rotate(240deg);
    }

    .sk-circle-dot:nth-child(9) {
        transform: rotate(270deg);
    }

    .sk-circle-dot:nth-child(10) {
        transform: rotate(300deg);
    }

    .sk-circle-dot:nth-child(11) {
        transform: rotate(330deg);
    }

    .sk-circle-dot:nth-child(1):before {
        animation-delay: -1.1s;
    }

    .sk-circle-dot:nth-child(2):before {
        animation-delay: -1s;
    }

    .sk-circle-dot:nth-child(3):before {
        animation-delay: -0.9s;
    }

    .sk-circle-dot:nth-child(4):before {
        animation-delay: -0.8s;
    }

    .sk-circle-dot:nth-child(5):before {
        animation-delay: -0.7s;
    }

    .sk-circle-dot:nth-child(6):before {
        animation-delay: -0.6s;
    }

    .sk-circle-dot:nth-child(7):before {
        animation-delay: -0.5s;
    }

    .sk-circle-dot:nth-child(8):before {
        animation-delay: -0.4s;
    }

    .sk-circle-dot:nth-child(9):before {
        animation-delay: -0.3s;
    }

    .sk-circle-dot:nth-child(10):before {
        animation-delay: -0.2s;
    }

    .sk-circle-dot:nth-child(11):before {
        animation-delay: -0.1s;
    }

@keyframes sk-circle {
    0%, 80%, 100% {
        transform: scale(0);
    }

    40% {
        transform: scale(1);
    }
}


/*  Circle Fade */
.sk-circle-fade {
    width: var(--sk-size);
    height: var(--sk-size);
    position: relative;
}

.sk-circle-fade-dot {
    width: 100%;
    height: 100%;
    position: absolute;
    left: 0;
    top: 0;
}

    .sk-circle-fade-dot:before {
        content: '';
        display: block;
        width: 15%;
        height: 15%;
        background-color: var(--sk-color);
        border-radius: 100%;
        animation: sk-circle-fade 1.2s infinite ease-in-out both;
    }

    .sk-circle-fade-dot:nth-child(1) {
        transform: rotate(30deg);
    }

    .sk-circle-fade-dot:nth-child(2) {
        transform: rotate(60deg);
    }

    .sk-circle-fade-dot:nth-child(3) {
        transform: rotate(90deg);
    }

    .sk-circle-fade-dot:nth-child(4) {
        transform: rotate(120deg);
    }

    .sk-circle-fade-dot:nth-child(5) {
        transform: rotate(150deg);
    }

    .sk-circle-fade-dot:nth-child(6) {
        transform: rotate(180deg);
    }

    .sk-circle-fade-dot:nth-child(7) {
        transform: rotate(210deg);
    }

    .sk-circle-fade-dot:nth-child(8) {
        transform: rotate(240deg);
    }

    .sk-circle-fade-dot:nth-child(9) {
        transform: rotate(270deg);
    }

    .sk-circle-fade-dot:nth-child(10) {
        transform: rotate(300deg);
    }

    .sk-circle-fade-dot:nth-child(11) {
        transform: rotate(330deg);
    }

    .sk-circle-fade-dot:nth-child(1):before {
        animation-delay: -1.1s;
    }

    .sk-circle-fade-dot:nth-child(2):before {
        animation-delay: -1.0s;
    }

    .sk-circle-fade-dot:nth-child(3):before {
        animation-delay: -0.9s;
    }

    .sk-circle-fade-dot:nth-child(4):before {
        animation-delay: -0.8s;
    }

    .sk-circle-fade-dot:nth-child(5):before {
        animation-delay: -0.7s;
    }

    .sk-circle-fade-dot:nth-child(6):before {
        animation-delay: -0.6s;
    }

    .sk-circle-fade-dot:nth-child(7):before {
        animation-delay: -0.5s;
    }

    .sk-circle-fade-dot:nth-child(8):before {
        animation-delay: -0.4s;
    }

    .sk-circle-fade-dot:nth-child(9):before {
        animation-delay: -0.3s;
    }

    .sk-circle-fade-dot:nth-child(10):before {
        animation-delay: -0.2s;
    }

    .sk-circle-fade-dot:nth-child(11):before {
        animation-delay: -0.1s;
    }

@keyframes sk-circle-fade {
    0%, 39%, 100% {
        opacity: 0;
        transform: scale(0.6);
    }

    40% {
        opacity: 1;
        transform: scale(1);
    }
}


/*  Grid */
.sk-grid {
    width: var(--sk-size);
    height: var(--sk-size);
    /* Cube positions
   * 1 2 3
   * 4 5 6
   * 7 8 9
   */
}

.sk-grid-cube {
    width: 33.33%;
    height: 33.33%;
    background-color: var(--sk-color);
    float: left;
    animation: sk-grid 1.3s infinite ease-in-out;
}

    .sk-grid-cube:nth-child(1) {
        animation-delay: 0.2s;
    }

    .sk-grid-cube:nth-child(2) {
        animation-delay: 0.3s;
    }

    .sk-grid-cube:nth-child(3) {
        animation-delay: 0.4s;
    }

    .sk-grid-cube:nth-child(4) {
        animation-delay: 0.1s;
    }

    .sk-grid-cube:nth-child(5) {
        animation-delay: 0.2s;
    }

    .sk-grid-cube:nth-child(6) {
        animation-delay: 0.3s;
    }

    .sk-grid-cube:nth-child(7) {
        animation-delay: 0.0s;
    }

    .sk-grid-cube:nth-child(8) {
        animation-delay: 0.1s;
    }

    .sk-grid-cube:nth-child(9) {
        animation-delay: 0.2s;
    }

@keyframes sk-grid {
    0%, 70%, 100% {
        transform: scale3D(1, 1, 1);
    }

    35% {
        transform: scale3D(0, 0, 1);
    }
}


/*  Fold */
.sk-fold {
    width: var(--sk-size);
    height: var(--sk-size);
    position: relative;
    transform: rotateZ(45deg);
}

.sk-fold-cube {
    float: left;
    width: 50%;
    height: 50%;
    position: relative;
    transform: scale(1.1);
}

    .sk-fold-cube:before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-color: var(--sk-color);
        animation: sk-fold 2.4s infinite linear both;
        transform-origin: 100% 100%;
    }

    .sk-fold-cube:nth-child(2) {
        transform: scale(1.1) rotateZ(90deg);
    }

    .sk-fold-cube:nth-child(4) {
        transform: scale(1.1) rotateZ(180deg);
    }

    .sk-fold-cube:nth-child(3) {
        transform: scale(1.1) rotateZ(270deg);
    }

    .sk-fold-cube:nth-child(2):before {
        animation-delay: 0.3s;
    }

    .sk-fold-cube:nth-child(4):before {
        animation-delay: 0.6s;
    }

    .sk-fold-cube:nth-child(3):before {
        animation-delay: 0.9s;
    }

@keyframes sk-fold {
    0%, 10% {
        transform: perspective(140px) rotateX(-180deg);
        opacity: 0;
    }

    25%, 75% {
        transform: perspective(140px) rotateX(0deg);
        opacity: 1;
    }

    90%, 100% {
        transform: perspective(140px) rotateY(180deg);
        opacity: 0;
    }
}


/*  Wander */
.sk-wander {
    width: var(--sk-size);
    height: var(--sk-size);
    position: relative;
}

.sk-wander-cube {
    background-color: var(--sk-color);
    width: 20%;
    height: 20%;
    position: absolute;
    top: 0;
    left: 0;
    --sk-wander-distance: calc(var(--sk-size) * 0.75);
    animation: sk-wander 2.0s ease-in-out -2.0s infinite both;
}

    .sk-wander-cube:nth-child(2) {
        animation-delay: -0.5s;
    }

    .sk-wander-cube:nth-child(3) {
        animation-delay: -1.0s;
    }

@keyframes sk-wander {
    0% {
        transform: rotate(0deg);
    }

    25% {
        transform: translateX(var(--sk-wander-distance)) rotate(-90deg) scale(0.6);
    }

    50% { /* Make FF rotate in the right direction */
        transform: translateX(var(--sk-wander-distance)) translateY(var(--sk-wander-distance)) rotate(-179deg);
    }

    50.1% {
        transform: translateX(var(--sk-wander-distance)) translateY(var(--sk-wander-distance)) rotate(-180deg);
    }

    75% {
        transform: translateX(0) translateY(var(--sk-wander-distance)) rotate(-270deg) scale(0.6);
    }

    100% {
        transform: rotate(-360deg);
    }
}
